THE SCUTELLEROIDEA OF THE DOUGLAS 
LAKE REGION 
DAYTON STONER 
INTRODUCTION 
The Seutelleroidea form an important and interesting part of 
the hemipterous fauna of almost every region. During the 
summers of 1919 and 1920 opportunity was afforded the writer 
for collecting and studying the seutelleroid fauna in the vicinity 
of the University of Michigan Biological Station situated on 
Douglas Lake in northern Michigan. The results are brought 
together in the form of the present annotated list which, based 
as it is on rather intensive collecting in a fairly well circum- 
seribed area, should furnish data for more definite conclusions 
concerning the geographical distribution and natural history of 
these insects. 
Field work was done during the months of July and August 
and the material thus secured affords the basis for this paper. 
Collecting was not attempted at a distance of more than fifteen 
miles from the lake. Without doubt other species of Scutelle- 
roidea occur in the area herein discussed, although collecting 
was usually indulged in several times each week. Species which, 
from their known distribution, should presumably occur in the 
region, but which have not yet been recorded, are included at 
the end of this paper in a ‘‘ Hypothetical List.’’ Twenty-three 
species are at present represented from the region by specimens 
now in my collection. These are discussed in the following 
pages. A few words concerning topography, soil conditions, 
flora, etc., may be opportune at this point. 
Douglas Lake is located toward the extreme northern end of 
the southern peninsula of Michigan, a little more than seven- 
teen miles south of the Straits of Mackinae and about the same 
distance from Lake Michigan on the west and Lake Huron on 
the east. It lies in the Transition Zone, between the northern 
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